Kevin Gausman #39 of the Baltimore Orioles throws a pitch in the fourth inning against the Detroit Tigers during Game Two of the American League Division Series at Oriole Park at Camden Yards on October 3, 2014 in Baltimore, Maryland. (Rob Carr, Getty Images)

A couple of former Colorado prep baseball stars made their major league postseason debuts Friday night.

Pitchers Marco Gonzales of St. Louis and Kevin Gausman of Baltimore both came on in relief for their teams.

Gonzales, who pitched at Rocky Mountain, entered the sixth inning for the Cardinals, pitching one inning and allowed one hit and no runs. He was credited with the win in the 10-9 St. Louis victory.

Gausman, who played at Grandview, entered the game in the fourth inning and pitched 3-2/3 innings, allowing three hits, an earned run and striking out five. Baltimore won 7-6.

Starter Kevin Gausman of the Baltimore Orioles throws a pitch in the first inning against the New York Yankees during a game at Oriole Park at Camden Yards on July 13, 2014 in Baltimore. (Patrick McDermott, Getty Images)

Neil Devlin, originally from the Philadelphia area, has covered high school sports in Colorado for more than 30 years, writing about the people, athletes and events that encompass the Rocky Mountain prep sports world.